qfix: remove indexeddb provider

[aonnikov]

No description provided.

[huly-github-staging]

Connected to Huly®: UBERF-13917

[Copilot]

Pull Request Overview

This PR removes the IndexedDB provider implementation from the text editor resources, simplifying the collaborative text editor to use only remote providers for synchronization.

• Removed the entire IndexedDB provider implementation and its usage
• Simplified the collaborative text editor to use a single provider instead of dual local/remote providers
• Cleaned up package dependencies by removing unused libraries

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
plugins/text-editor-resources/src/provider/indexeddb.ts	Completely removed the IndexedDB provider implementation
plugins/text-editor-resources/src/provider/utils.ts	Removed createLocalProvider function and IndexeddbProvider import
plugins/text-editor-resources/src/components/CollaborativeTextEditor.svelte	Simplified to use single provider, removed local provider logic and state tracking
plugins/text-editor-resources/package.json	Removed unused dependencies y-websocket and y-indexeddb

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